JP2822524B2 - Fluorescent display tube - Google Patents
Fluorescent display tubeInfo
- Publication number
- JP2822524B2 JP2822524B2 JP189690A JP189690A JP2822524B2 JP 2822524 B2 JP2822524 B2 JP 2822524B2 JP 189690 A JP189690 A JP 189690A JP 189690 A JP189690 A JP 189690A JP 2822524 B2 JP2822524 B2 JP 2822524B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- display tube
- fluorescent display
- luminance
- zno
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ZnO:Znけい光体を用いたけい光表示管に関
し、特に発光輝度の向上及び輝度のばらつきを改善した
けい光表示管に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent display tube using a ZnO: Zn phosphor, and more particularly to a fluorescent display tube having improved emission luminance and improved luminance variation. .
けい光表示管のけい光体層には、100V以下の電子線に
より励起され発光するけい光体として従来よりZnO:Znけ
い光体が主に用いられている。このけい光体は発光しき
い電圧が低く、十数Ｖの電圧が充分な発光輝度が得られ
ることからけい光表示管用のけい光体として現在広く使
用されている。In a phosphor layer of a fluorescent display tube, a ZnO: Zn phosphor has been mainly used as a phosphor which emits light when excited by an electron beam of 100 V or less. This phosphor has a low light emission threshold voltage and a voltage of more than ten volts can provide sufficient light emission luminance, so that it is currently widely used as a phosphor for a fluorescent display tube.
ところで、100V以下の低速電子線でけい光体を励起発
光させる場合、けい光体に射突する電子はけい光体粒子
中にはほとんど侵入せず、その侵入深さは高々数＋Å程
度といわれており、発光の大部分はけい光体表面で発生
する。したがって、けい光体の表面状態で発光特性に大
きく影響すると考えられる。By the way, when a phosphor is excited and emitted with a low-speed electron beam of 100 V or less, electrons that strike the phosphor hardly penetrate into the phosphor particles, and the penetration depth is said to be several + Å at most. Most of the light emission occurs on the phosphor surface. Therefore, it is considered that the surface state of the phosphor greatly affects the light emission characteristics.
通常、けい光表示管の製造工程において、けい光体は
焼成，封入，排気等の熱処理工程を経るため、その表面
が汚染ないしは変質を受けやすい。Usually, in the process of manufacturing a fluorescent display tube, the phosphor undergoes a heat treatment process such as firing, encapsulation, and exhaustion, so that the surface thereof is susceptible to contamination or deterioration.
〔発明が解決しようとする課題〕 上述したように、従来のけい光表示管に用いられてい
るZnO:Znけい光体は、けい光表示管製造工程中に受ける
種々の汚染により、けい光体自体が持っている本来の性
能を充分引き出すことができず、輝度，発光効率の低下
をまねき、輝度のばらつきがでたり、あるいは温度特性
（高温放置，高温動作での輝度の低下）が悪いという欠
点があった。[Problems to be Solved by the Invention] As described above, the ZnO: Zn phosphor used in the conventional fluorescent display tube is a fluorescent material due to various contaminations received during the process of manufacturing the fluorescent display tube. The original performance of the device itself cannot be brought out sufficiently, leading to a decrease in luminance and luminous efficiency, resulting in variations in luminance or poor temperature characteristics (decrease in luminance during high-temperature storage and high-temperature operation). There were drawbacks.
特に最近の車載用等の高輝度，長寿命が要求される分
野においては、けい光体の表面汚染等による輝度の低下
は問題であった。In particular, in a field where high luminance and long life are required, such as a recent in-vehicle use, a decrease in luminance due to surface contamination of a phosphor has been a problem.
本発明のけい光表示管は、ZnO:Znけい光体とTiO,SnO,
NiOのうち少なくても一種類を混合してなるけい光体層
を有している。すなわち、ZnO:Znけい光体にTiO,SnO,Ni
Oを混合することによりけい光表示管の製造工程中に、
けい光体の表面に極力汚染物質を付着させないようにし
たものである。The fluorescent display tube of the present invention is a ZnO: Zn phosphor and TiO, SnO,
It has a phosphor layer formed by mixing at least one of NiO. That is, TiO, SnO, Ni are added to ZnO: Zn phosphor.
During the manufacturing process of the fluorescent display tube by mixing O,
This is to prevent contaminants from adhering to the surface of the phosphor as much as possible.
次に、本発明について図面を参照して説明する。第１
図は本発明の第１の実施例の発光組成物の断面図であ
る。本実施例の発光組成物は、平均粒径３〜５μｍのZn
O:Znけい光体１に平均粒径２〜３μｍのTiO2を1.5重量
％混合させたものである。Next, the present invention will be described with reference to the drawings. First
The figure is a cross-sectional view of the light emitting composition of the first embodiment of the present invention. The luminescent composition of this example has a Zn particle having an average particle size of 3 to 5 μm.
The O: Zn phosphor 1 is obtained by mixing 1.5% by weight of TiO2 having an average particle size of 2 to 3 [mu] m.
第３図は本発明による一実施例のけい光表示管の要部
断面図である。まず、ガラス等の絶縁基板４上に給電導
体５を被着する。つづいて絶縁層６を形成し、この絶縁
層６のスルーホールを介して給電導体５と電気的に接続
した陽極導体７を形成する。次に前記発光組成物３をエ
チルセルロース等のバインダーを用いて蛍光体ペースト
となし、スクリーン印刷法により陽極導体７上に被着
し、けい光体層８を形成する。次に、けい光体層８に対
面する上方にメッシュ状の制御電極９を、さらにフィラ
メント状の陰極10を取り付け、カバーガラス11を基板４
に封着してけい光表示管が完成する。FIG. 3 is a sectional view of a main part of a fluorescent display tube according to an embodiment of the present invention. First, the power supply conductor 5 is attached on an insulating substrate 4 made of glass or the like. Subsequently, an insulating layer 6 is formed, and an anode conductor 7 electrically connected to the power supply conductor 5 via a through hole in the insulating layer 6 is formed. Next, the phosphor composition is formed into a phosphor paste by using a binder such as ethyl cellulose, and the phosphor composition is applied on the anode conductor 7 by a screen printing method to form a phosphor layer 8. Next, a mesh-shaped control electrode 9 and a filament-shaped cathode 10 are attached above the phosphor layer 8 and the cover glass 11 is attached to the substrate 4.
To complete the fluorescent display tube.
このようにして製造した本発明のけい光表示管は、従
来のけい光表示管に比較して初期輝度は５％程度改善さ
れ、輝度ばらつきも少なく、かつ高温放置後の輝度低下
率が従来の20〜30％程度から15％前後へと改善された。The fluorescent display tube of the present invention manufactured as described above has an initial luminance improved by about 5%, a small luminance variation, and a low luminance reduction rate after being left at a high temperature, as compared with the conventional fluorescent display tube. It improved from about 20-30% to around 15%.
第２図は本発明による第２の実施例の発光組成物の断
面図である。この実施例の発光組成物は、平均粒径が３
〜５μｍのZnO:Znけい光体１に平均粒径が１μｍ以下の
微粒子状のTiO2を0.5重量％混合付着させたものであ
る。その発光組成物を用いて第１の実施例と同様の製造
方法によってけい光表示管を製作する。FIG. 2 is a sectional view of a light emitting composition according to a second embodiment of the present invention. The luminescent composition of this example has an average particle size of 3
A ZnO: Zn phosphor 1 having a thickness of about 5 .mu.m is mixed with 0.5% by weight of fine TiO2 having an average particle diameter of 1 .mu.m or less. Using the luminescent composition, a fluorescent display tube is manufactured by the same manufacturing method as in the first embodiment.
この実施例では１μｍ以下の微粒子状のTiOを混合す
ることにより、混合量が第１の実施例より少なくてす
み、かつ初期輝度は10％程度改善され、また高温放置後
の輝度低下率は10％程度と大巾に改善された。In this embodiment, by mixing fine TiO particles of 1 μm or less, the mixing amount can be smaller than that of the first embodiment, the initial luminance is improved by about 10%, and the luminance reduction rate after leaving at high temperature is 10%. % Has been greatly improved.
なお、上記実施例ではTiOを説明したが、SnO,NiOを混
合した場合にもTiOを混合した場合と同様な結果が得ら
れている。また、TiO,SnO,NiOのZnO:Znけい光体への混
合量は0.05重量％以下では輝度改善の効果が少なく、20
重量％を越えると輝度の低下がみられる。Although TiO was described in the above embodiment, the same result as in the case of mixing TiO is obtained when SnO and NiO are mixed. When the mixing amount of TiO, SnO, and NiO to the ZnO: Zn phosphor is 0.05% by weight or less, the effect of improving the luminance is small, and
When the content exceeds% by weight, a decrease in luminance is observed.
以上説明したように本発明は、ZnO:Znけい光体にTiO,
SnO,NiOのうち少なくとも一種を混合することによりけ
い光体表面の汚染を防止し、これにより発光輝度が向上
しまた輝度ばらつきも少なく、かつ高温における温度特
性も改善される等多大な効果がある。As described above, the present invention provides a ZnO: Zn phosphor with TiO,
By mixing at least one of SnO and NiO, it is possible to prevent contamination of the phosphor surface, thereby improving the luminous brightness, reducing the luminance variation, and improving the temperature characteristics at high temperatures, etc. .
第１図は本発明の第１の実施例の発光組成物の断面図、
第２図は本発明の第２の実施例の発光組成物、第３図は
本発明のけい光表示管の要部断面図である。 １…ZnO:Znけい光体、２…TiO、３…発光組成物、４…
絶縁基板、５…給電導体、６…絶縁槽、８…陽極導体、
８…けい光体層、９…制御電極、10…陰極、11…カバー
ガラス。FIG. 1 is a cross-sectional view of a luminescent composition according to a first embodiment of the present invention,
FIG. 2 is a sectional view of a main part of a luminescent composition according to a second embodiment of the present invention, and FIG. DESCRIPTION OF SYMBOLS 1 ... ZnO: Zn phosphor, 2 ... TiO, 3 ... Light emitting composition, 4 ...
Insulating substrate, 5: power supply conductor, 6: insulating tank, 8: anode conductor,
8: phosphor layer, 9: control electrode, 10: cathode, 11: cover glass.
Claims (1)
極から放出された電子を射突させて、前記けい光体層を
励起発光させて表示するけい光表示管において、前記け
い光体層が、ZnO:Znけい光体にTiO,SnO,NiOのうち少な
くても一種を、ZnO:Znけい光体に対して0.05〜20重量％
混合してなる発光組成物よりなることを特徴とするけい
光表示管。1. A fluorescent display tube for emitting electrons emitted from a cathode to an anode having a phosphor layer adhered to an upper surface thereof to excite the phosphor layer to emit light, thereby displaying the phosphor layer. The phosphor layer is composed of at least one of TiO, SnO and NiO in the ZnO: Zn phosphor, and 0.05 to 20% by weight based on the ZnO: Zn phosphor.
A fluorescent display tube comprising a mixed light-emitting composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP189690A JP2822524B2 (en) | 1990-01-08 | 1990-01-08 | Fluorescent display tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP189690A JP2822524B2 (en) | 1990-01-08 | 1990-01-08 | Fluorescent display tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03208242A JPH03208242A (en) | 1991-09-11 |
| JP2822524B2 true JP2822524B2 (en) | 1998-11-11 |
Family
ID=11514349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP189690A Expired - Lifetime JP2822524B2 (en) | 1990-01-08 | 1990-01-08 | Fluorescent display tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2822524B2 (en) |
-
1990
- 1990-01-08 JP JP189690A patent/JP2822524B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03208242A (en) | 1991-09-11 |
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